ANSI Z21.57-2010

(reaffirmed 2021)

American National Standard For Recreational Vehicle Cooking Gas Appliances

Legal Notice for Standards

Canadian Standards Association and CSA America Standards, Inc. (operating as “CSA Group”) develop standards through a consensus standards development process approved by the Standards Council of Canada and the American National Standards Institute. This process brings together volunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA Group administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.

Disclaimer and exclusion of liability

This document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this document’s fitness for a particular purpose or use, its merchantability, or its non-infringement of any third party’s intellectual property rights. CSA Group does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA Group makes no representations or warranties regarding this document’s compliance with any applicable statute, rule, or regulation.

IN NO EVENT SHALL CSA GROUP, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS INTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA GROUP HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES.

In publishing and making this document available, CSA Group is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA Group accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document.

CSA Group is a private not-for-profit company that publishes voluntary standards and related documents. CSA Group has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes.

Intellectual property rights and ownership

As between CSA Group and the users of this document (whether it be in printed or electronic form), CSA Group is the owner, or the authorized licensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSA Group’s and/or others’ intellectual property and may give rise to a right in CSA Group and/or others to seek legal redress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA Group reserves all intellectual property rights in this document.

Patent rights

Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA Group shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility.

Authorized use of this document

This document is being provided by CSA Group for informational and non-commercial use only. The user of this document is authorized to do only the following:

If this document is in electronic form:

• load this document onto a computer for the sole purpose of reviewing it;

• search and browse this document; and

• print this document if it is in PDF format.

  Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA Group to have such copies, and only if this Legal Notice appears on each such copy.

  In addition, users may not and may not permit others to

• alter this document in any way or remove this Legal Notice from the attached standard;

• sell this document without authorization from CSA Group; or

• make an electronic copy of this document.

  If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.

  
  

  
  

  Standards Update Service

  ANSI Z21.57-2010

  January 2011

  
  

  Title: American National Standard For Recreational Vehicle Cooking Gas Appliances

  To register for e-mail notification about any updates to this publication

• go to www.csagroup.org/store/

• click on Product Updates

The List ID that you will need to register for updates to this publication is 2421075.

If you require assistance, please e-mail techsupport@csagroup.org or call 416-747-2233.

Visit CSA Group’s policy on privacy at www.csagroup.org/legal to find out how we protect your personal information.

AMERICAN NATIONAL STANDARD ANSI Z21.57-2010

Tenth Edition - 2010

This Standard is based on the Standard for Recreational Vehicle Cooking Gas Appliances

ANSI Z21.57-2005

Addenda Z21.57a-2007, and Z21.57b-2008

APPROVED

November 11, 2010

American National Standards Institute, Inc.

Secretariat CSA AMERICA INC.

8501 East Pleasant Valley Road

Cleveland, Ohio 44131

Published - January 2011 Copyright © 2011 CSA America, Inc.

Permission is granted to republish material herein in laws or ordinances, and in regulations, administrative orders, or similar documents issued by public authorities. Those desiring permission for other republication should consult CSA America, Inc., 8501 East Pleasant Valley Road, Cleveland, Ohio 44131.

Preface

This publication represents a standard for safe operation, substantial and durable construction, and acceptable performance of recreational vehicle cooking gas appliances. It is the result of years of experience in the manufacture, testing, installation, maintenance, inspection and research on appliances designed for the utilization of gas. There are risks of injury to persons inherent in some appliances that, if completely eliminated, would defeat the utility of the appliance. The provisions in this Standard are intended to reduce such risks while retaining the normal function of the appliance.

Nothing in this standard is to be considered in any way as indicating a measure of quality beyond compliance with the provisions it contains. It is designed to allow compliance of recreational vehicle cooking gas appliances, the construction and performance of which may exceed the various provisions specified herein. In its preparation, full recognition has been given to possibilities of improvement through ingenuity of design. As progress takes place, revisions may become necessary. When they are believed desirable, recommendations should be forwarded to CSA America, Inc., 8501 East Pleasant Valley Road, Cleveland, Ohio 44131.

Safe and satisfactory operation of a recreational vehicle cooking gas appliance depends to a great extent upon its proper installation and it should be installed in accordance with the Standard for Recreational Vehicles, ANSI A119.2, or the National Fuel Gas Code, ANSI Z223.1/NFPA 54, manufacturers’ installation instructions, and local municipal codes.

Users of this American National Standard are advised that the devices/products/activities within its scope may be subject to regulation at the Federal, state or local level. Users are strongly urged to investigate this possibility through appropriate channels. In the event of a conflict with this standard, the Federal, state or local regulation should be followed.

CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute, Inc., require that action be taken to reaffirm, revise or withdraw this standard no later than five (5) years from the date of approval. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute, Inc., 25 West 43rd Street, Fourth Floor, New York, N.Y. 10036, (212) 642-4900.

EFFECTIVE DATE: An organization using this standard for product evaluation as a part of its certification program will normally establish the date by which all products certified by that organization should comply with this standard.

History Of The Development Of Standard For Recreational Vehicle Cooking Gas Appliances

(This History is informative and is not part of the standard.)

Although the preparation and promulgation of standards for domestic gas ranges had been in progress for almost thirty years, the first American Standard for gas ranges approved by the American Standards Association was in 1932. This latest and most comprehensive standard was the result of a general revision and enlargement of the previous standards by the domestic gas range subcommittee of ASA Sectional Committee Z21 under the sponsorship of the American Gas Association.

Following this edition of the domestic gas range standard (Z21.1), a number of subsequent editions were issued which included revisions deemed necessary in line with industry developments. In each case, draft revisions were distributed for review and comment and reviewed by the subcommittee prior to finalization of the revised standard.

Following the thirteenth edition of the standard, which was approved as American Standard in 1955, the domestic gas range standard was divided into two volumes. These became the fourteenth edition, Volume I, Free Standing Units (Z21.1.1), and the first edition, Volume II, Built-In Domestic Cooking Units (Z21.1.2), which were approved as American Standards by the American Standards Association in 1956.

As a result of the use of domestic gas ranges by the recreational vehicle and manufactured (mobile) home industry, the standards were modified to cover the special construction and performance features deemed necessary for ranges for installation in such vehicles. These revisions were included in the first addenda to the standards approved as American Standards in 1960. Subsequent editions of both standards were approved in 1961 and 1964.

On August 24, 1966 the American Standards Association was reconstituted as the United States of America Standards Institute. On October 6, 1969, the United States of America Standards Institute was renamed the American National Standards Institute, Inc.

With the increasing popularity of recreational vehicles, the subcommittee concluded that provisions to recognize special appliance designs and use conditions were needed in the domestic gas range standards. Rather than attempting to add this coverage to the existing standards, the subcommittee prepared a draft standard to cover recreational vehicle cooking gas appliances for use with liquefied petroleum gases. This draft standard, which was comprised of the related coverage from the eighteenth edition of Z21.1.1 and the fifth edition of Z21.1.2, plus additional coverage for vibration, compactness of design, etc., was adopted by the Z21 Committee in March 1971. The first edition of the recreational vehicle cooking gas appliance standard was approved as American National Standard by the American National Standards Institute, Inc., in 1972.

Further revisions in line with developments in gas utilization, including the transfer of the remaining coverage for appliances for recreational vehicle installation from American National Standard for Household Cooking Gas Appliances (Z21.1) were incorporated in the second edition of the recreational vehicle cooking gas appliance standard which was approved as American National Standard by the American National Standards Institute, Inc., in 1974. The third, fourth, fifth, sixth, seventh, eighth and ninth editions of the recreational vehicle cooking gas appliance standard were approved as American National Standards by the American National Standards Institute, Inc., in 1978, 1982, 1987, 1990, 1993,

2001 and 2005 respectively.

This, the tenth edition of the recreational vehicle cooking gas appliance standard was approved by the American National Standards Institute on November 29, 2010

Previous editions of the recreational vehicle cooking gas appliances standard, and addenda thereto, approved by the American National Standards Institute are as follows:

NOTE: This edition of Z21.57 incorporates changes to the 2005 edition of Z21.57 and addenda thereto. Changes, other than editorial, are denoted by a vertical line in the margin.

Z21/83 Committee on Performance and Installation of Gas Burning Appliances and Related Accessories

DARYL L. HOSLER, Chairman PAUL E. BEACH, Vice Chairman

REPRESENTING AIR-CONDITIONING, HEATING & REFRIGERATION INSTITUTE:

REPRESENTING AMERICAN ASSOCIATION OF FAMILY AND CONSUMER SERVICES:

JoAnn Emmel

REPRESENTING AMERICAN GAS ASSOCIATION:

James A. Ranfone

REPRESENTING ASSOCIATION OF HOME APPLIANCE MANUFACTURERS:

Matthew Williams

REPRESENTING ATMOS ENERGY:

Ronnie Ray Frazier

REPRESENTING BURNER TECHNOLOGY UNLIMITED, INC.:

Carl Suchovsky

REPRESENTING CONSUMERS:

Amy B. Sherwin Hall Virgil

REPRESENTING DIRECT ENERGY INC.:

Geoff Atkinson

REPRESENTING HEARTH, PATIO & BARBECUE ASSOCIATION:

Thomas Stroud

REPRESENTING INDIVIDUAL MEMBERS:

Daryl L. Hosler (Non-Voting) Issac Sargunam

Z21/83 Committee on Performance and Installation of Gas Burning Appliances and Related Accessories (con’t.)

REPRESENTING KEYSPAN ENERGY:

Edward J. Angelone

REPRESENTING NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION:

Gerard Winstanley (Non-Voting)

REPRESENTING NATIONAL PROPANE GAS ASSOCIATION:

Bruce J. Swiecicki

REPRESENTING NORTH AMERICAN ASSOCIATION OF FOOD EQUIPMENT MANUFACTURERS:

Charlie Souhrada Terry Wiseman (Alternate)

REPRESENTING SOUTHERN CALIFORNIA GAS COMPANY:

Lance DeLaura Ron S. Caudle (Alternate)

REPRESENTING UNDERWRITERS LABORITORIES:

Robert Wozniak Travis Hardin (Alternate)

REPRESENTING U.S. CONSUMER PRODUCT SAFETY COMMISSION:

Donald W. Switzer (Non-Voting)

REPRESENTING U.S. DEPARTMENT OF ENERGY:

Cyrus Nasseri

Technical Advisory Group On Standards For Domestic Gas Ranges

Alan Wasetis, Chairman

John Bieritz Paul Cadima

Thomas Chodacki Richard Clinton David Delaquila

Robert Dunn (Alternate Member) Craig Fernandes

Ed Grzesik

Roger Hetler (Alternate Member) Susana Katz

Jim Kimble (Alternate Member) John Kloster

Donna Linzey

Noel Martin (Alternate Member) Allen Pirro

Mike Pryor Joe Rose

Robert Rothrock Todd Smith

Frank Stanonik (Alternate Member) Carl Suchovsky

Matthew Williams

Contents

Part I Construction

Page

1. Scope 1

2. General Construction And Assembly 2

3. Appliance Structure 5

4. Glass and Ceramic Panels 6

5. Gas Supply Lines 8

6. Manual Gas Valves And Other Energy Controlling Devices 9

7. Gas Appliance Pressure Regulators 12

8. Automatic Valves 12

9. Thermostats 13

10. Orifices And Orifice Fittings 14

11. Main Burner And Pilot Input Ratings 14

12. Burners 15

13. Top Surface Cooking Section Burner Lighters 17

14. Automatic Gas Ignition Systems 18

15. Pilot Gas Filters 20

16. Cooking Tops, Surface Cooking Section Covers And Utensil Supports 20

17. Drip Trays 21

18. Oven And Broiler Linings And Oven Bottoms 21

19. Oven Racks, Rack Supports And Broiler Pans 22

20. Thermal Insulation 23

21. Venting And Combustion Air Supply 23

22. Flue Collars 24

23. Flue Deflectors 24

24. Electrical Equipment And Wiring 25

25. Instructions 33

26. Marking 38

Part II Performance

1. General 45

2. Test Gases 46

3. Test Pressures And Burner Adjustments 47

4. Combustion 48

5. Burner And Pilot Operating Characteristics 50

6. Top Surface Cooking Section Burner Lighters 54

7. Ignition Systems 57

8. Manual Gas Valves 64

9. Gas Appliance Pressure Regulators 64

10. Automatic Valves 64

11. Thermostats 64

12. Safety Circuit Analysis 68

13. Broiler Performance 69

14. Evaluation Of Clothing Ignition Potential 69

15. Evaluation Of Burn Hazard Potential Of Exterior Surfaces 72

16. Temperatures Of Handles, Knobs And Touchpads 73

17. Wall, Floor And Enclosure Temperatures 74

18. Abnormal Operation Stalled-fan Test 77

19. Flue Gas Temperature 77

    Contents (Continued)

20. Draft Hoods 78

21. Exhaust Hood Outlet Air Temperatures 80

22. Performance Of An Appliance Incorporating A Microwave Cooking Section 80

23. Marking Material Adhesion And Legibility 80

Tables

Table I. Gas Pressure And Input Rate Conditions For

Use In The Various Performance Tests 84

Table II. Minimum Acceptable Wall Thickness

For Non-Ferrous Semi-Rigid Tubing 84

Table III. Maximum Tubing And Fitting Temperatures 85

Table IV. 85

Table V. Oven Rack Loading 85

Table VI. Maximum Allowable Rise Above Room

Temperature For Various Component Parts (*1) 86

Table VII. 87

Table VIII. Maximum Allowable Motor Winding Temperatures, °F (C) 87

Table IX. Characteristics Of Test Gases 87

Table X. Inlet Test Pressures 88

Table XI. Maximum Surface Temperature, °F (°C)* 88

Table XII. Maximum Handle And Knob Temperatures, °F (°C)*

(As measured by thermocouples) 89

Table XIII. Test Conditions For Wall, Floor And Enclosure Temperature Tests 90

Figures

Figure 1. Recommended Dimensions for D-Shaped Handle Cavity

for Valve Stems of 11/32 Inch (8.7 mm) Diameter 92

Figure 2. Test Structure for Built-In Top and Oven Units for

Installation in Counter-Height Cabinets 93

Figure 3. Test Structure for Built-In Top Units for

Installation in Counter-Height Cabinets 94

Figure 4. Test Enclosure for Testing Built-In Oven and Broiler Units 95

Figure 5. Location of Temperature Indicating Device for Determination of Ambient Room Temperature During Test for

Wall, Floor and Enclosure Temperatures 95

Figure 6. Shielded Thermocouple Between Two 1 In (25.4 mm)

Squares of 1/16 In (1.6 mm) Aluminum 96

Figure 7. Combustion Utensil 96

Figure 8. Griddle Plate Used In Combustion Test 97

Figure 9. Arrangement of Test Apparatus Simulating Reaching for

Controls or Performing Cooking Operations 97

Figure 10. Arrangement of Test Apparatus Simulating Both Reaching for

Controls or Performing Cooking Operations and Oven Usage 98

Figure 11. Surfaces Surrounding a Knob or Control and Subject to Contact 99

Figure 12. Temperature-Measuring and Accessibility Probe 100

Figure 13. Method of Sealing Annuli Around Vent During

Wall and Enclosure Temperature Tests 101

Figure 14. Method of Mounting Thermocouple 101

Exhibit A. List of Referenced Standards 103

Part III Manufacturing And Production Tests 107

Part IV Definitions 109

APPENDIX A. Pertinent References To ANSI Y14.15 119

APPENDIX B. Wire Color Designations 120

APPENDIX C. Recommended Wire Color Usage 121

APPENDIX D. Preferred Graphic Symbols Of Commonly USED Items, Extracted From Standard ANSI/IEEE 315, Graphic Symbols For Electrical

And Electronics Diagrams, And Abbreviations For These Items 122

APPENDIX E. Sample Failure Modes and Effects Analysis For Component Miswiring 124

APPENDIX F. Table of Conversion Factors 125

NOTE

This standard contains SI (Metric) equivalents to the yard/pound quantities, the purpose being to allow the standard to be used in SI (Metric) units. (Standard for use of the International System of Units (SI): The Modern Metric System, IEEE/ASTM SI IO, is used as a guide in making metric conversion from yard/pound quantities.) If a value for a measurement and an equivalent value in other units, the first stated is to be regarded as the requirement. The given equivalent value may be approximate. If a value for a measurement and an equivalent value in other units, are both specified as a quoted marking requirement, the first stated unit, or both shall be provided.

American National Standard For Recreational Vehicle Cooking Gas Appliances

Part I: Construction

1. Scope

   
   

   1.1.1

   This standard applies to newly produced compact cooking gas appliances (see Part IV, Definitions) hereinafter referred to as units or appliances, constructed of entirely new, unused parts and materials, intended for installation in recreational vehicles, including recreational park trailers:

   
   

   1. For use with propane gases only; or

      
      

   2. For use with natural gas convertible for use with propane gas (see 1.1.3-e). The construction of units is covered under Part I.

   The performance of units is covered under Part II.

   
   

   1.1.2

   Larger cooking gas appliances intended for recreational park trailers are covered by the Standard for Household Cooking Gas Appliances, ANSI Z21.1.

   
   

   1.1.3

   This standard applies to cooking appliances designed to be recessed into, placed upon and attached to the construction of a recreational vehicle. Built in units are further classified as:

   
   

   1. Top or surface unit. A unit for installation in or on a counter top.

      
      

   2. Oven unit. A unit for installation in a cabinet, wall or partition, or for installation on a counter. It may be a separate oven, may be equipped with a broiler that uses the oven burner, or the oven may serve as a broiler with a burner in the upper portion of the oven.

      
      

   3. Broiler unit. May have an open top or be enclosed, may be a separate broiler, or may be combined with a rotisserie.

      
      

   4. Combinations of "-a," "-b" or "-c" above, or any other cooking device that may be for similar installation.

      
      

   5. Convertible unit. A unit for use with natural gas and propane gases with provisions for the simple conversion from one gas to the other, equipped with double coaxial main burner orifices and a convertible gas appliance pressure regulator. (Also see Part IV, Definitions.)

   
   

   1.1.4

   For the purposes of this standard, units are also classified as:

   1. Full-Sized Unit. Any unit which does not qualify as a compact unit.

      
      

   2. Compact Unit. A unit whose outer casing encloses a volume not in excess of 6 ft3 (0.17 m3)and whose weight is not in excess of 80 lb (36.3 kg). For the determination of volume, back-guards, vent extensions, handles, etc., may be removed. For the determination of weight, other easily removable parts such as conventional top burners, oven racks, etc., may also be removed.

      
      

   3. Convertible Unit. A unit for use with natural gas and liquefied petroleum gases with provisions for the simple conversion from one gas to the other, equipped with double coaxial main burner orifices and a convertible gas appliance pressure regulator. (Also see Part IV, Definitions.)

   
   

   1.1.5

   This standard covers all electrical equipment, wiring and accessories built in or supplied for use with an appliance for use with low-voltage direct current or alternating current. Appliances for use with alternating current shall have a current limitation of 20 amperes and have its electrical equipment, wiring and accessories installed in accordance with the National Electrical Code, ANSI/NFPA 70.

   
   

   This standard covers (a) appliances which use only gas for cooking and which are designed for connection to either a low-voltage direct current supply or nominal 120 volt alternating current supplies; or (b) appliances which also use electrical energy for cooking and which are designed for connection to either nominal 120 volt or 240 volt alternating current supplies.

   
   

   1.1.6

   Appliances having sections which use electrical energy for cooking shall comply with the applicable provisions of the Safety Standard for Household Electric Ranges, ANSI/UL 858.

   
   

   1.1.7

   A microwave cooking appliance incorporated in a recreational vehicle cooking appliance shall comply with the applicable provisions of the Safety Standard for Microwave Cooking Appliances, UL 923.

   
   

   1.1.8

   An exhaust hood incorporated in an appliance shall comply with the applicable provisions of the Safety Standard for Electric Fans, ANSI/UL 507.

   
   

   1.1.9

   If a value for measurement as given in this standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.

   
   

   1.1.10

   All references to psi throughout this standard are to be considered gauge pressure unless otherwise specified.

   
   

   1.1.11

   Exhibit A, List of Reference Standards, contains a list of standards specifically referenced in this standard, and sources from which these reference standards may be obtained.

   
   

2. General Construction And Assembly

1.2.1

In submitting an appliance for test, the manufacturer may furnish a list of manufacturing tolerances applicable thereto and may have the appliance tested for compliance with this standard in both extremes of tolerances specified.